现在的楼梯灯开关普遍使用一种声光控延时开关，它使用方便，节约电能，但均无电路图。笔者根据“奇城电工”生产的产品实物进行测绘整理并进行电路原理分析，仅供参考。１ 电路功能简介 白天，环境亮度较大，开关不开启。晚上，脚步（或其它）声音触发开关开启，白炽灯发光， Today’s staircase light switches generally use an acousto-optic control delay switch, which is easy to use and saves energy, but none of the circuit diagrams. The author carried out the mapping and analysis of the circuit principle based on the products produced by “Chicheng Electric” and was for reference only. 1 Introduction to Circuit Features During the daytime, the environment is bright and the switch does not turn on. At night, the footstep (or other) sound triggers the switch to turn on and the incandescent lamp glows.